REFERENCES
- Autonomous car. (n.d.). In Wikipedia. Retrieved June 2015 from https://en.wikipedia.org/wiki/Autonomous_car
- United Nations. (1980). World Populaton Ageing 2013. Retrieved on June 2015, from http://www.un.org/en/development/desa/population/publications/pdf/ageing/WorldPopulationAgeing2013.pdf.